Origin of the violation of the fluctuation-dissipation theorem in systems with activated dynamics

被引：38

作者：

Pérez-Madrid, A

Reguera, D

Rubí, JM

机构：

[1] Univ Barcelona, Dept Fis Fonamental, CER Fis Sistemes Complexos, E-08028 Barcelona, Spain

[2] Univ Calif Los Angeles, Dept Chem & Biochem, Los Angeles, CA 90095 USA

来源：

PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS | 2003年 / 329卷 / 3-4期

基金：

美国国家科学基金会;

关键词：

fluctuation-dissipation theorem; effective temperatures; slow relaxation; glassy systems; mesoscopic nonequilibrium thermodynamics;

D O I：

10.1016/S0378-4371(03)00634-4

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We analyze the validity of the fluctuation-dissipation theorem for slow relaxation systems in the context of mesoscopic nonequilibrium thermodynamics. We demonstrate that the violation arises as a natural consequence of the elimination of fast variables in the description of a glassy system, and it is intrinsically related to the underlying activated nature of slow relaxation. In addition, we show that the concept of effective temperature, introduced to characterize the magnitude of the violation, is not robust since it is observable-dependent, can diverge, or even be negative. (C) 2003 Elsevier B.V. All rights reserved.

引用

收藏

页码：357 / 364

页数：8

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